2009 Chumba EVO All Mountain Spec

According to the Chumba website, the $4200 complete build, the rear derailleur is listed as Shimano XT but the shifters are listed as SRAM X-9. I thought that these two are incompatible due to their shift actuation ratios. Has that changed or is this not really the true build?

Getting a dropper post is like getting a bidet. I didn't know I needed one until I get one and boy, does my ass thank me.